Find the 6th term in the sequence 5, 20, 80

5120

Step-by-step explanation:

a=5 r=80÷20 r=4

Using the formula

Tn=a×r^(n-1)

Therefore 6th term=5×4^(6-1)

6th term=5×4^5

6th term=5×4×4×4×4×4

6th term=5120

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.

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